EP2493020B1 - Antennenvorrichtung - Google Patents

Antennenvorrichtung Download PDF

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Publication number
EP2493020B1
EP2493020B1 EP10824790.9A EP10824790A EP2493020B1 EP 2493020 B1 EP2493020 B1 EP 2493020B1 EP 10824790 A EP10824790 A EP 10824790A EP 2493020 B1 EP2493020 B1 EP 2493020B1
Authority
EP
European Patent Office
Prior art keywords
radome
sidelobe
reflector
radio waves
primary radiator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP10824790.9A
Other languages
English (en)
French (fr)
Other versions
EP2493020A4 (de
EP2493020A1 (de
Inventor
Shinichi Yamamoto
Shuji Nuimura
Izuru Naito
Toshiyuki Horie
Hiroyuki Sato
Makio Tsuchiya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of EP2493020A1 publication Critical patent/EP2493020A1/de
Publication of EP2493020A4 publication Critical patent/EP2493020A4/de
Application granted granted Critical
Publication of EP2493020B1 publication Critical patent/EP2493020B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/42—Housings not intimately mechanically associated with radiating elements, e.g. radome
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/02—Waveguide horns
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/02—Details
    • H01Q19/021—Means for reducing undesirable effects
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
    • H01Q19/13—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination

Definitions

  • the present invention relates to an antenna device for reducing a sidelobe deterioration caused by reflection waves from a radome.
  • an antenna device of this type there is an antenna device that reduces sidelobes by attaching a fin-like flat plate to a support structure of a sub reflector (see, for example, Non Patent Literature 1).
  • NPL 1 Toshio Satoh, Shizuo Endo, Naoto Matsunaka, Shinichi Betsudan, Koji Katagi, Takashi Ebisui, "SIDELOBE LEVEL REDUCTION BY IMPROVEMENT OF STRUT SHAPE," The Institute of Electronics, Information and Communication Engineers, Technical Report AP81-12, pp.29-36, May, 1981 .
  • radome reflection waves are reflected at the reflector so as to increase sidelobes of the antenna.
  • Conventional antenna devices are effective in reducing sidelobes caused by scattering at the support structure of the sub reflector but are not effective for the radome reflection wave.
  • EP 1 168 490 A2 discloses an antenna apparatus covered with a radome.
  • a waveguide is used as a stay for a horn feed and the waveguide is pasted or coated with an electromagnetic wave absorbing material, thereby suppressing or minimizing the degradation of sidelobe characteristics.
  • EP 1 128 468 A2 discloses an antenna in which a main reflector has a shield with a band of dielectric or conductive material extending around at least a portion of the inner surface of the shield for reducing the return loss of the antenna. Patterns may be improved by providing a shield of absorbing material extending around the outer periphery of at least an end portion of a primary feed.
  • the primary feed extends along the axis of the main reflector on the concave side of the main reflector, and a subreflector located beyond the end of the primary feed has an image-inverting surface configuration that has a ring focus located between the main reflector and the subreflector and extending around the axis of the main reflector.
  • US 3 196 442 A disclosed an antenna with a sidelobe absorber mounted adjacent thereto.
  • a ferrite rod may be used as the sidelobe absorber.
  • GB 2 145 569 A discloses a reflector antenna intended for use in the microwave or millimeter waveband which has a supporting post or strut which supports a component of the antenna and is located in the plane wave produced by the main reflector.
  • the plane wave is therefore scattered and in order to improve the performance of the antenna the surface of the strut is modified so as to cause random scatter of the primary wave so that the field strength of the scattered wave is reduced.
  • EP 0 192 048 A1 discloses a further example of a strut having features for scattering radiation randomly therefrom.
  • JP 2006 217459 A discloses a scatterer in the form of a truncated cone.
  • the present invention has been made to solve the above-mentioned problem, and an object thereof is to provide an antenna device that can reduce a sidelobe deterioration caused by reflection waves from a radome.
  • an antenna device according to claim 1.
  • the present invention it is possible to reduce the sidelobe in a specific direction of the antenna by scattering radio waves reflected by the radome.
  • FIG. 1 is a side view illustrating a structure of an antenna according to a first embodiment of the present invention
  • FIG. 2 is a top view illustrating the structure of the antenna according to the first embodiment of the present invention, which is viewed from the top of FIG. 1 .
  • a radome 5 is disposed so as to enclose a reflector antenna constituted of a primary radiator 1 and a reflector 4.
  • a shape of the radome 5 is a combination of a hemisphere and a cylinder in the diagram but may be an arbitrary shape.
  • the primary radiator 1 supported by a feed waveguide 3 at the center of the axisymmetric reflector 4, but this is merely an example.
  • An arbitrary antenna structure may be adopted.
  • the primary radiator 1 may be a type of irradiating the reflector 4 via a sub reflector from a primary radiator of a horn antenna or the like, for example, or may be a type of directly irradiating the reflector 4. In the case of the former type, the primary radiator is considered to include the sub reflector.
  • reference numeral 6 denotes a support post in FIGS. 1 and 2 .
  • radio waves 7 radiated from the primary radiator 1 are reflected by the reflector 4 to become radio waves 8 directed from the reflector 4 to the radome 5, and further pass through the radome 5 and be radiated therefrom as radio waves 10 passing through the radome 5.
  • a part of the radio waves entering the radome 5 become radio waves 9 reflected by the radome 5 and irradiate an antenna structure.
  • the radio waves 9 reflected by the radome 5 are reflected by a part of the antenna structure and cause a deterioration of a sidelobe in a specific direction of the antenna.
  • the radio waves 9 reflected by the radome 5 are concentrated to a certain extent in a specific spot in accordance with a shape of the radome 5 and the shape of the antenna. For instance, if the radio waves that can be regarded as plane waves enter the radome 5 having a cylindrical shape from the direction perpendicular to an axis of the cylinder, the waves substantially converge at linear positions having a distance from the radome 5 that is approximately half the radius of the radome 5. In addition, if the radio waves that can be regarded as plane waves enter the radome 5 having a hemispherical shape from the direction of the center of the sphere, the waves substantially converge at a spot having a distance from the radome 5 that is approximately half the radius of the radome 5.
  • the radio waves 9 reflected by the radome 5 are reflected by the metal structure.
  • the radio waves 9 reflected by the metal structure pass through the radome 5 directly or are reflected by the reflector 4 or the like and then pass through the radome 5 to become a sidelobe in a specific direction of the antenna.
  • An object of the present invention is to reduce a level of the sidelobe in a specific direction by scattering of the radio waves 9 reflected by the radome 5. If the spot at which the waves reflected by the radome 5 converge is a position at which the feed waveguide 3 or the primary radiator 1 is disposed, a sidelobe reduction member 2 is attached to the vicinity of the feed waveguide 3 or the primary radiator 1 so that the reflecting condition is changed and the direction of generating the sidelobe is changed.
  • the sidelobe reduction member 2 is constituted of a metal structure and scatters the radio waves 9 reflected by the radome 5 so as to reduce the sidelobe in a specific direction of the antenna.
  • a shape of the sidelobe reduction member 2 is changed to be a desired pattern, the direction in which the sidelobe caused by the reflection waves from the radome 5 increases can be changed.
  • a shape of the sidelobe reduction member 2 is changed in such a manner that the reflection waves 9 from the radome 5 are scattered, a level of the sidelobe can be reduced.
  • sidelobe deterioration caused by reflection waves from the radome 5 can be reduced by attaching, in the vicinity of the primary radiator 1 or the feed waveguide 3, the sidelobe reduction member 2 for reducing the sidelobe in a specific direction of the antenna by scattering of the radio waves 9 reflected by the radome 5 which are a part of radio waves radiated from the primary radiator 1.
  • the sidelobe reduction member 2 may be changed to be a structure formed of both of metal and absorbing material or as an example may be changed to be a structure formed only of absorbing material.
  • metal structure because the radio waves 9 reflected by the radome 5 are reflected by the structure, the direction of generating the sidelobe is changed, but the sidelobe is generated in a certain direction. If the structure is changed to the absorbing material, a part of the radio waves 9 reflected by the radome 5 are absorbed so that a level of the sidelobe can be reduced.
  • This absorbing material is not necessarily a complete absorbing material. If at least a part of the entering radio waves 9 reflected by the radome 5 are absorbed, this can contribute to reducing the sidelobe.
  • a shape of the absorbing material may be a block shape (lump shape), or the absorbing material may be a plate-like absorbing material.
  • FIGS. 3 illustrate a part of an antenna device according to a second embodiment of the present invention and illustrate an example of a specific shape of the sidelobe reduction member 2 illustrated in FIGS. 1 and 2 .
  • FIG. 3(a) is a perspective view
  • FIG. 3(b) is a side view
  • FIG. 3 (c) is a front view.
  • a plurality of wedge-shaped metal members 11 are attached as the sidelobe reductionmember 2 to the vicinity of the primary radiator 1 or the feed waveguide 3 at which the radio waves 9 reflected by the radome 5 converge.
  • the plurality of wedge-shaped metal members 11 are formed by bending a plate metal member and are arranged radially with the axis of the feed waveguide 3 as the center so that the acute angles of the wedges face outward as illustrated in FIGS. 3 .
  • the primary radiator 1 is a conical horn radiator, and the primary radiator 1 is supposed to have another sub reflector.
  • FIGS. 3 are the diagrams in which eight sheet metal members 11 are attached as the sidelobe reduction member 2.
  • the metal member 11 is not limited to the plate member but may be a wedge-shaped block (lump of a wedge filled with metal). Further, the number of the metal wedges, the opening angle of the wedges, the interval of the wedges, the length thereof in the axial direction, and the length thereof in the radial direction are not limited.
  • the wedge-shaped metal members 11 are attached to the primary radiator 1 or the feed waveguide 3, and hence the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in the specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • optimal sidelobe characteristics can be obtained.
  • FIGS. 3 illustrate an example in which the wedge-shaped metal members 11 are used as the sidelobe reduction member 2, but the members 11 may be formed of absorbing material.
  • the wedge-shaped absorbing material is not limited to a plate material but may be a block material (lump of a wedge filled with absorbing material), or the absorbing material may be attached to the outside of the wedge-shaped metal member 11.
  • the number of the wedge-shaped absorbing materials, the opening angle of the wedges, the interval thereof, the length thereof in the axial direction, and the length thereof in the radial direction are not limited.
  • the radio waves 9 reflected by the radome 5 are absorbed so that the sidelobe in a specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • FIGS. 4 illustrate a part of an antenna device according to a third embodiment of the present invention and illustrate another example of the specific shape of the sidelobe reduction member 2 illustrated in FIGS. 1 and 2 .
  • FIG. 4 (a) is a perspective view
  • FIG. 4 (b) is a side view
  • FIG. 4 (c) is a front view.
  • a plurality flat metal plates 12 are attached as the sidelobe reduction member 2 to the vicinity of the primary radiator 1 or the feed waveguide 3 at which the radio waves 9 reflected by the radome 5 converge.
  • the plurality of flat metal plates 12 are arranged radially with the axis of the feed waveguide 3 as the center.
  • the primary radiator 1 is a conical horn radiator, and the primary radiator 1 is supposed to have another sub reflector.
  • FIGS. 4 are the diagrams in which eight flat metal plates 12 are attached, but the number of the metal plates, the interval thereof, the length thereof in the axial direction, the length thereof in the radial direction, and the thickness of the flat plate are not limited.
  • the flat metal plates 12 are attached to the primary radiator 1 or the feed waveguide 3, and hence the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in the specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • optimal sidelobe characteristics can be obtained.
  • FIGS. 4 illustrate an example in which the flat metal plates 12 are used as the sidelobe reduction member 2, but the plates 12 may be formed of absorbing material. Further, the absorbing material may be attached to both sides of the eight flat plate metals 12 illustrated in FIGS. 4 . Further, the number of the absorbing flat plates, the interval thereof, the length thereof in the axial direction, the length thereof in the radial direction, and the thickness of the flat plate are not limited.
  • the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in a specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • optimal sidelobe characteristics can be obtained.
  • FIGS. 5 illustrate a part of an antenna device according to a fourth embodiment of the present invention and illustrate another example of a specific shape of the sidelobe reduction member 2 illustrated in FIGS. 1 and 2 .
  • FIG. 5(a) is a perspective view
  • FIG. 5(b) is a side view
  • FIG. 5(c) is a front view.
  • flat metal plates 13 having a sawtooth shape are attached as the sidelobe reduction member 2 to the vicinity of the primary radiator 1 or the feed waveguide 3 at which the radio waves 9 reflected by the radome 5 converge.
  • the flat metal plates 13 are arranged radially with the axis of the feed waveguide 3 as the center, and an outer edge thereof is formed in the sawtooth shape along the axis.
  • the primary radiator 1 is a conical horn radiator, and it is supposed that the primary radiator has another sub reflector. However, it is possible to adopt an antenna of the type in which the radio waves irradiate the reflector 4 directly from the primary radiator 1 or the feed waveguide 3.
  • FIGS. 5 are the diagrams in which eight sawtooth metal plates are attached as the sidelobe reduction member 2. However, the number of the metal flat plates, the interval thereof, the length thereof in the axial direction, the length thereof in the radial direction, the thickness of the flat plate, the height of the sawtooth, and the interval and the number of the teeth are not limited.
  • the flat metal plates 13, which are arranged radially with the axis of the feed waveguide 3 as the center and have the outer edges formed in the sawtooth shape along the axis, are attached to the primary radiator 1 or the feed waveguide 3.
  • the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in a specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • FIGS. 5 illustrate an example in which the flat metal plates 13 having the outer edges formed in the sawtooth shape are used as the sidelobe reduction member 2, but the plates 13 may be formed of absorbing material.
  • the primary radiator 1 is a conical horn radiator and is supposed to have another sub reflector, but it is possible to adopt an antenna of the type in which the radio waves irradiate the reflector 4 directly from the primary radiator 1 or the feed waveguide 3. Further, it is possible to attach the absorbing material to both sides of the metal plate 13 illustrated in FIGS. 5 .
  • the number of the absorbing flat plates, the interval thereof, the length thereof in the axial direction, the length thereof in the radial direction, the thickness of the flat plate, the height of the sawtooth, and the interval and the number of the teeth are not limited.
  • the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in a specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • optimal sidelobe characteristics can be obtained.
  • FIGS. 6 illustrate a part of an antenna device according to a fifth embodiment of the present invention and illustrate a specific shape of the sidelobe reduction member 2 illustrated in FIGS. 1 and 2 .
  • FIG. 6 (a) is a perspective view
  • FIG. 6(b) is a side view
  • FIG. 6(c) is a front view.
  • metal members 14 having a truncated cone shape are attached as the sidelobe reduction member 2 to the vicinity of the primary radiator 1 or the feed waveguide 3 at which the radio waves 9 reflected by the radome 5 converge.
  • the metal member 14 having the truncated cone shape has the same axis as the feed waveguide 3.
  • FIGS. 6 illustrate a part of an antenna device according to a fifth embodiment of the present invention and illustrate a specific shape of the sidelobe reduction member 2 illustrated in FIGS. 1 and 2 .
  • FIG. 6 (a) is a perspective view
  • FIG. 6(b) is a side view
  • FIG. 6(c) is a
  • the primary radiator 1 is a conical horn radiator and is supposed to have another sub reflector.
  • FIGS. 6 illustrate an example of the truncated cone shape, but the truncated cone shape is not limited to a block shape (lump of a truncated cone filled with metal) and may be a plate that forms only the side face of the truncated cone.
  • the diameter of the truncated cone contacting with the feed waveguide 3 or the primary radiator 1 is the same as the outer diameter of the feed waveguide 3 or the primary radiator 1, but the other diameter of the truncated cone and the length in the axial direction (height of the truncated cone) are not limited.
  • FIGS. 6 illustrate the truncated cone shape having a smaller diameter on the side closer to the primary radiator 1 and a larger diameter on the side closer to the reflector (a shape opening toward the reflector), but it is possible to adopt the opposite truncated cone shape having a larger diameter on the side closer to the primary radiator 1 and a smaller diameter on the side closer to the reflector (a shape closing toward the reflector).
  • the side having a smaller diameter is fixed to the feed waveguide 3 or the primary radiator 1.
  • the truncated cone metal member 14 is attached to the primary radiator 1 or the feed waveguide 3, and hence the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in the specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • the length of the truncated cone metal in the axial direction (height of the truncated cone) in accordance with an extent of convergence of the radio waves 9 reflected by the radome 5 optimal sidelobe characteristics can be obtained.
  • FIGS. 6 illustrate an example in which the truncated cone metal members 14 are used as the sidelobe reduction member 14, but the members 14 may be formed of absorbing material.
  • FIGS. 5 illustrates an example of the truncated cone shape, but the truncated cone shape is not limited to a block shape (lump of a truncated cone filled with absorbing material) and may be a plate that forms only the side face of the truncated cone. Further, it is possible to attach absorbing material to the surface or the side face of the truncated cone metal member 14.
  • the diameter of the truncated cone contacting with the feed waveguide 3 or the primary radiator 1 is the same as the outer diameter of the feed waveguide 3 or the primary radiator 1, but the other diameter of the truncated cone and the length in the axial direction (height of the truncated cone) are not limited.
  • FIGS. 6 illustrate the truncated cone shape having a smaller diameter on the side closer to the primary radiator 1 and a larger diameter on the side closer to the reflector (a shape opening toward the reflector), but it is possible to adopt the opposite truncated cone shape having a larger diameter on the side closer to the primary radiator 1 and a smaller diameter on the side closer to the reflector (a shape closing toward the reflector).
  • the side having a smaller diameter is fixed to the feed waveguide 3 or the primary radiator 1.
  • the radio waves 9 reflected by the radome 5 are scattered so that the sidelobe in a specific direction of the antenna can be reduced.
  • an influence on the radio waves 7 directed from the primary radiator 1 to the reflector 4 can be reduced.
  • the length of the truncated cone metal in the axial direction (height of the truncated cone) in accordance with an extent of convergence of the radio waves 9 reflected by the radome 5 optimal sidelobe characteristics can be obtained.

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  • Aerials With Secondary Devices (AREA)

Claims (2)

  1. Antennenvorrichtung, umfassend:
    eine Reflektorantenne einschließlich eines Primärstrahlers (1), eines Speisungswellenleiters (3) zum Speisen von Funkwellen an den Primärstrahler (1) und eines Reflektors (4); und
    ein Radom (5), das die Reflektorantenne abdeckt, wobei das Radom konfiguriert ist, Funkwellen, die von dem Reflektor gelenkt werden, weiterzureichen,
    wobei die Antennenvorrichtung ferner ein Nebenkeulenverringerungselement (2) umfasst, das an eine Umgebung des Primärstrahlers (1) oder des Speisungswellenleiters (3) angebracht ist, wobei das Nebenkeulenverringerungselement (2) eine Nebenkeule in eine bestimmte Richtung der Reflektorantenne durch Zerstreuen von Funkwellen verringert, die durch das Radom (5) reflektiert werden, was ein Teil der Funkwellen ist, die von der Reflektorantenne abgestrahlt werden,
    wobei das Nebenkeulenverringerungselement (2) aus Metall gebildet ist, dadurch gekennzeichnet, dass:
    das Nebenkeulenverringerungselement (2) aus einer Vielzahl von metallischen keilförmigen Elementen (11) gebildet ist, die mit einer Achse des Speisungswellenleiters (3) als ein Zentrum radial angeordnet sind, sodass spitze Winkel davon nach außen gerichtet sind; oder
    das Nebenkeulenverringerungselement (2) aus einer Vielzahl von metallischen flachen Plattenelementen (12; 13) gebildet ist, die mit einer Achse des Speisungswellenleiters als ein Zentrum radial angeordnet sind.
  2. Antennenvorrichtung nach Anspruch 1, wobei, wenn das Nebenkeulenverringerungselement (2) aus einer Vielzahl von metallischen flachen Plattenelementen (12; 13) gebildet ist, die mit einer Achse des Speisungswellenleiters als ein Zentrum radial angeordnet sind, die Vielzahl von metallischen flachen Plattenelementen (13) jeweils eine Außenkante haben, die in einer Sägezahnform entlang der Achse des Speisungswellenleiters gebildet ist.
EP10824790.9A 2009-10-21 2010-10-05 Antennenvorrichtung Not-in-force EP2493020B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009242668 2009-10-21
PCT/JP2010/067431 WO2011048941A1 (ja) 2009-10-21 2010-10-05 アンテナ装置

Publications (3)

Publication Number Publication Date
EP2493020A1 EP2493020A1 (de) 2012-08-29
EP2493020A4 EP2493020A4 (de) 2014-04-16
EP2493020B1 true EP2493020B1 (de) 2018-03-07

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EP10824790.9A Not-in-force EP2493020B1 (de) 2009-10-21 2010-10-05 Antennenvorrichtung

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Country Link
US (1) US8766865B2 (de)
EP (1) EP2493020B1 (de)
JP (1) JPWO2011048941A1 (de)
WO (1) WO2011048941A1 (de)

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CN105789912B (zh) * 2016-03-16 2019-09-24 深圳光启高等理工研究院 吸波超材料、天线罩和天线***
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US8766865B2 (en) 2014-07-01
WO2011048941A1 (ja) 2011-04-28
EP2493020A4 (de) 2014-04-16
US20120098723A1 (en) 2012-04-26
EP2493020A1 (de) 2012-08-29
JPWO2011048941A1 (ja) 2013-03-07

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